Seiko Cal. 5691 - 766

Seiko 5691-766

The 5691-766 is a sought-after Automatic piece from Seiko's golden era. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-828b5d7c97f8]

Also known as: Sumo, Tuna

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
9.6mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
200m
Dial Color
Navy
Jewels
34j
Frequency
28,800 bph
Power Reserve
54 hours
Year
1983

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